Type-writing machine.



No. 717,741. PATENTED JAN-6, 15503.

G. GABRIELSON. TYPE WRITING MACHINE.

APPLICATION FILED AUG. 8, 1902.

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717,741- PATENTED JAN. 6, "190a. I a. GA'BRIBLSON.

TYPE WRITING MACHINE.

APPLICATION FILED AUG. 8, 1902.

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UNITED STATES 1 PATENT OFFICE.

CARL GABRIELSON, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO UNIONTYPEWRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORA- TION OF NEWJERSEY.

TYPE-WRlTlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 717,741, dated. January6, 1903.

Application filed August El, 1902. Serial No. 118,876. (No model.)

3T0 caZZ whmm it may concern:

Be it known that I, CARL :GABRIELSON,.3. citizen of the United States,and a resident of Springfield, in the county of Hampden and 5 State ofMassachusetts, have invented certain new and useful Improvements inType- Writing Machines, of which the following is aspecification. I 3

My invention relates to mechanism for affording fractional line-spacingof the platen; and the object of the invention is to provide simple,cheap, and efficient mechanism of the character specifiedand whereinthere is little liability of the parts becoming derangedor broken.

A further object of my invention is to provide simple and efficientmechanism of the character specified which can be applied to existingforms of type-writing machines with little or no modification of thestructural features of said machines.

To the above and other ends, which will hereinafter appear, my inventionconsists in the novel features of construction, arrangements of parts,and combinations of elements, to be hereinafter described and claimed.

In the accompanying drawings, wherein like reference charactersdesignate corresponding parts in the various views, Figure 1 isafragmentary plan view of suflicient number of parts of one form oftype-writing machines to illustrate my invention, the view illustratingthe left hand end of the-platen and platen-frame with the features of myin-v 5 vention applied thereto. Fig. 2 is an enlarged like view of thesame with parts omitted. Fig. 3 is a detail end view which correspondsto a section taken on the line a: w of Fig. 2 and looking in thedirection of the arrow at 40 said line. Fig. 4 is a detail longitudinalsectional view of the sleeve for holding the friction-disk in place.Fig. 5 is an enlarged detail plan view which corresponds to Fig. 2,except that the detent is shown disengaged 5 from itscodperating.line-spacing ratchetwheel. Fig. 6 is a longitudinalsectional view of the parts represented in Fig. 5, the section beingtaken on the line y y of Fig. 5 and looking in the direction of thearrow at said line.

. the platen-frame.

The platen 1 is secured in any suitable manher to a platen-shaft 2,which extends through openings in the ends of the platen-frame 3 andturns in suitable bearings, and to each end of the platen-shaft issecured a handwheel 4. The hand-wheel at the left is secured to theshaft by means of a screw 5, which is received in a tapped opening inthe collar 6, that extends inwardly from the handwheel, and the innerend of the screw bears upon the platen-shaft, thus connecting thehand-wheel thereto to effect a rotation of the platenby the hand-wheelwhen desired. At

the left-hand end of the platen is provided a platen-head 7, which issecured to the core 8 of the platen by headed screws 9, that extendthrough openingsin the platen-head and take into the core. Theplaten-head has a circular series of ratchet-teeth 10, which projectfrom the outer side or face of the platenhead and constitute aline-spacing ratchetwheel. Cooperating with this line-spacingratchet-wheel is a line-feed pawl 11, that has a pivot loosely seated inan opening in a crank-arm 13, rigidly connected to a rock* shaft 14,that turns in a bearing 15 on the platen-frame. One end of a coiledspring 16 is connected to the rock-shaft, whereas the opposite end ofsaid spring bears beneath the pivot ofthe crank-arm 13, thus tendingnorreally to raise the arm and cause the pawl pivoted thereto to contactwith an adjustable abutment or arm 17, that is connected to a sleeve 18,adapted to turn in a bearing 19 on The shaft 14, hereinbefore referredto, extends forwardly through the sleeve 18, which constitutes anadditional bearing therefor, and the shaft is rigidly connected at itsouter end by a pin 20 to a finger-piece 21, by means of which therockshaft may be rocked to efiect a line-space movement of the platen. Aspring 22 is coiled about the pivot 12, which is fixed to the feed-pawl,and the spring is connected at one end to said pivot and at its oppositeend 5 to the crank-arm 13, so that the pawl when released from theabutment 17 is forced into engagement with the teeth of theratchetwheel. The sleeve 18 has a depending arm 23, that receives alocking-pin provided with ICO against the sleeve.

a head 24. This locking-pin is adapted to take into any one of a seriesof segmentallyarranged openings in a depending segment 25, secured tothe bearing 19. In this manner the abutment 17 may be adjusted to anyone of several positions to effect a line-spacing movement of the platenfor one, two, or three teeth of the ratchet-wheel, as may be desired, ateach line-spacing operation. An

annular space is formed within the circular series of ratchet-teeth, inwhich a friction disk or shoe 26 may be contained. This frictiondisk ispreferably made of resilient material-su ch as leather, rubber, or thelikeand is adapted to bear upon the smooth face 27 of the platen-headwhen pressure is exerted on the disk in a direction longitudinally orendwise of the platen and to constitute an efficient friction-braketherefor that prevents it from being accidentally displaced or rotated,but permits the platen to be turned to the desired extent by either ofthe hand-wheels.

The friction disk 26 is secured centrally thereof to a sleeve 28 by anysuitable means. In the present instance the sleeve is provided with aflange 29, against which the outer face of the friction-disk is adaptedto bear, whereas the central perforation in the disk is received on theneck 30 of the sleeve, and the disk is maintained in place and preventedfrom rotating on the sleeve by the turned-in end 31 thereof, which isembedded in the disk, as represented in Fig. 6, though the body portionof the disk is capable of being moved or deflected into contact with theplaten-head, as will hereinafter appear. The sleeve 28 surrounds theplaten-shaft 2 and extends through an openingin one end oftheplaten-frame3 and is secured to the platen-frame by a set-screw 32, thatis received in a tapped opening in the platen frame and bears at itsinner end The platen-shaft passes freely through the sleeve, so that thehandwheel and platen may rotate independently thereof. A plate or disk33 is mounted on the sleeve 28 and is adapted to bear on the outer faceof the friction-disk. This plate is recessed at 34 in order that theflange 29 on the sleeve may be accommodated therein and the inner faceof the plate be permitted to bear on the friction-disk. A collar orsleeve 35 is connected to and extends outwardly from the plate and withthe plate turns freely on the sleeve 28. The outer end of this sleeve orcollar has riveted thereto an up wardly-extending arm 36, that isprovided with a finger-piece 37. The outer face of the plate 33 has arecess therein that forms a cam 38, and to the rear of this cam issituated a pin 39, that projects outwardly from the face of the plate. Aspring-detent 40, that car- The disposition of the cam 38 on the plate33 is such that when the plate is turned to the position represented inFigs. 1, 5, and 6 the terminal of the spring of the detent will bereceived within the depression, thus enabling the pressure of the springof the detent to be exerted upon the line-spacing ratchet-wheel throughthe roller 41. When, however, the finger-piece 37 is turned from theposition shown in Fig. 1 to that represented in Fig. 2, it causes thedetent to be thrown and maintained out of cooperation with the teeth ofthe line-spacing ratchet-wheel by the movement of the cam 38. Theturning movement of the plate and its attached finger-piece is limitedby the pin 39, that is adapted to contact with the spring of the detent,as represented in Fig. 2, and in this disposition of the parts the endof the spring will rest on the outer face of the plate 33 and maintainthe parts in the position shown until the plate is turned back to theposition represented in Fig. 1. The movement of the plate from theposition represented in Fig. 1 to that shown in Fig. 2 causes thepressure of the spring-detent to be exerted upon the plate 33, whichtends to move it in a direction longitudinally of the platen, thusapplying the pressure of the spring-detent to the friction-disk, and theresiliency or flexibility of the latter enables it to be forced intocontact with the platen-head to exert a braking action on the platen, sothat the movement of the detent out of engagement with the teeth of theline spacing ratchet wheel automatically causes the spring-pressure ofthe detent to be exerted upon the platen to prevent the free oraccidental rotation thereof. At' this time the platen may be rotated toany desired extent to bring any desired portion thereof to theprinting-line. Thus, for instance, in fractional line -spacing, where itis desired to bring a portion of the platen or the paper thereon to theprinting-line, which cannot be effected with the ordinary line-spacingmechanism, it is merely necessary to move the finger-piece 37 toward thefront of the machine, when the spring-detent will be thrown out ofcooperation with the line-spacing ratchetwheel and the pressure thereofwill be exerted upon the friction disk. The platen may then be rotatedto the desired extent by either of the hand-wheels 4, and the platenwill be maintained by the friction-disk in the position to which it hasbeen moved.

It should be understood that for the purpose of my invention it isimmaterial what character or construction of line spacing mechanism isused in connection with the line-spacing ratchet-wheel, that shown beingsimilar to the line-spacing mechanism illustrated in the Patent No.647,055, granted April 10, 1900, to O. D. Wallace.

From certain aspects of my invention the part which cooperates with thefriction-disk to afiord a braking action of the platen may be regardedas a platen-head, and from other IIO aspects it may be regarded as apart of the line-spacing ratchet-wheel,which may be connected in anysuitable manner to rotate with the platen.

It will be observed that the pressure of the spring-detect on theratchet-teeth is endwise of the platen, and that the braking action onthe platen is by a pressure exerted longitudinally thereof. It willlikewise be seen that the plate 33 is adapted to turn on the axis of theplaten and to move longitudinally thereof and that the turning movementof the plate is eifective to disengage the spring-detent from theline-spacing ratchet-wheel, whereas the slight movement of the platelongitudinally of the platen is effective to exert a braking pressure onthe platen; that the device forming the subject-matter of my inventionoccupies but little space, issimple in construction and efiicient inoperation, and in application requires few, if any, structural changesin existing forms of typewriting machines.

While I have shown one form of my invention, various modifications maybemade without departing from the spirit thereof.

What I claim as new, and desire to secure by Letters Patent, is-- 1. Ina type-writing machine, the combination of a platen, a detent therefor,and means for automatically placing an endwise pressure on the platenwhen the detent is released.

2. In a type-writing machine, the combination of a platen, a spring-pressed detent therefor, and means for applying pressu reiendwise ofthe platen when the detent is moved against its spring-pressure torelease the platen.

3. In a type-writing machine, the combination of a platen, a detenttherefor, a brake which is moved longitudinally of the platen, and meansfor applying a braking-pressure to the brake when the detent is thrownout of cooperation with the platen.

4. In a type-writing machine, the combination of a platen, aratchet-wheel therefor, a spring-pressed detent that cooperates withsaid ratchet-wheel, a brake which applies its pressure endwise of theplaten, and means for applying the spring-pressure of the detent to thebrake when the detent is thrown out of engagement with the ratehetwheel.

5. In a type-writing machine, the combination of a platen, aratchet-wheel therefor, a spring-pressed detent that normally bearsagainst said ratchet-wheel, and hand-operated means which removes thepressure of the spring-detentfrom the teeth of the ratchetwheel andapplies it as a brake to the end of the platen.

6. In a type-writing machine, the combination of a platen, aratchet-wheel connected to rotate therewith, the teeth on theratchetwheel being on a side thereof, a spring-det-ent that cooperateswith the teeth of the ratchetwheel and exerts its pressurelongitudinally of the platen, and means for removing the pressure of thedetent from the teeth of the ratchet-wheel and exerting it on the platento afiord a fractional spacing thereof.

7. .In a type-writing machine, the combination of a platen, aratchet-wheel, a detent cooperating with the teeth of the ratchet-wheel;

a friction-disk that is adapted to coeperate with a platen-head, andmeans for removing the pressure of the detent from the ratchet wheel andexerting pressure on said frictiondisk.

8. In a type-writing machine, the combination of a platen, aratchet-wheel, a springdetent that normally bears on the teeth of theratchet-wheel, a friction-disk that is adapted to cooperate with aplaten-head, and means for moving the detent against its spring-pressureand out of contact with the teeth .of the ratchet-wheel and exertingsaid spring-pressure on the friction-disk. 4

9. .In a type-writing machine, the combination of a revolvingplaten, afriction-disk that is adapted to be maintained fixed against rotationduring the rotation of the platen, and means for moving saidfriction-disk into frictional contact with a platen-head.

10. In a type-writing machine, the combination of a revolving platen, aratchet-wheel, a detent for said ratchet-wheel, a friction-disk that isfixed against rotation, and means for moving said detent out ofcooperation with the teeth of the ratchet-wheel. and for moving saidfriction-disk into frictional contact with a platen-head.

11. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-wheel that is arranged to rotate with the platen, adetent that cooperates with the teeth of said ratchet-wheel, and meansfor throwing the detent out of codperation with the teeth of theratchet-wheel and applying a pressure endwise of the platen to anotherportion of said ratchet-wheel.

12. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-wheel thatis arranged to rotate with .the platen, aspring-detent that normally bears upon the teeth of said ratchet-wheel,and. means for moving the detent against its spring-pressure and out ofcooperation with the teeth of the ratchet-wheel and for applyingthepressure of the detent endwise of the platen to another portion of saidratchetwheel.

13. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-wheel that is arranged to rotate with the platenand has the teeth situated on one of its sides, a spring-detent thatexerts its pressure longitudinally. of the platen, and means forthrowing the detent out of cooperation with. the teeth of theratchet-wheel and exerting the spring-pressure to retard the freerotation of the platen for fractional linespacing.

14. In a type-writing machine, the combi V nation of a revolving platen,a platen-head having line-spacing ratchet-teeth thereon, a spring-detentthat bears upon said ratchetteeth, a friction-disk that is adapted tobear upon the platen-head Within said teeth, and means for moving thedetent out of contact with the ratchet-teeth and for applying pressureto the friction-disk.

15. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-wheel that is arranged to rotate With the platen, aspring-detent that normally bears upon the teeth of said ratchet-Wheel,a friction-disk that is adapted to bear endwise of the platen and on apart that rotates therewith, and hand-operated means for throwing thedetent out of contact with the teeth of the ratchet-wheel and forsimultaneously applying pressure to the friction-disk.

16. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-wheel that is arranged to rotate with the platen, aspring-detent that normally bears upon the teeth of said ratchet-wheel afriction-disk that is adapted to hear endwise of the platen on a partthat rotates there- With, and hand-operated means for moving the detentagainstits spring-pressure to throw the detent out of contact with theteeth of the ratchet-wheel and for simultaneously applying thespring-pressure of the detent to the friction-disk to afford afractional linespacing of the platen.

'17. In a type-writing machine, the combination of a revolving platen, aline-spacing ratchet-Wheel arranged to rotate therewith, a spring-detentthat cooperates with the teeth of the ratchet-Wheel, a friction-shoethat is adapted to act as a brake to retard the free rotation of theplaten, and a hand-operated actuating part that moves longitudinally ofthe platen and applies pressure to the brakeshoe when the detent ismoved out of cooperation with the teeth of the ratchet-wheel.

18. In a type-Writing machine, the combination of,a revolving platen, aline-spacing ratchet-wheel arranged to rotate therewith, a spring-detentthat cooperates with the teeth of the ratchet-wheel, a friction-shoethat is fixed against rotation and is adapted to act as a brake toretard the free rotation of the platen, and a hand-operated actuatingpart that oscillates transversely and moves longitudinally of theplaten, and applies pressure to the brake-shoe when moved to throw thedetent out of cooperation with the teeth of the ratchet-wheel.

19. In a type-Writing machine, the combination of a revolving platen, aline-spacing ratchet-Wheel arranged to rotate therewith, a spring-detentthat cooperates with the teeth of the ratchetwheel, a friction-shoe thatis adapted to act as a brake to retard the free rotation of the platen,and a hand-operated actuating part that has a cam which lifts the detentoff the teeth of the ratchet-Wheel and moves longitudinally of theplaten to apply pressure to the brake-shoe when the detentis moved outof cooperation with the teeth of the ratchet-wheel.

20. In a type-writing machine, the combination of a platen, aplaten-head having a circular series of line-spacing ratchet-teeththereon, a friction-disk contained within said circular series of teeth,a spring-detent which normally bears upon the ratchet-teeth, and ahand-actuated cam that is movable to move the detent against itsspring-pressure and out of contact with the ratchet-teeth and to applythe pressure of the spring-detent to the friction-disk for fractionalline-spacing.

21. In a type-Writing machine, the combination of a platen, aline-spacing ratchet- Wheel, a detent therefor, and a detent-releasingdevice which is adapted to turn and to move longitudinally of the platenand is effective when turned to remove the detent from engagement withthe ratchet-teeth and. to move longitudinally of the platen to applypressure thereto for fractional line-spacing.

22. In a type-Writing machine, the combination of a revolving platen, aratchet-wheel arranged to revolve with the platen, a springdetentnormally hearing on the teeth of the ratchet-wheel and mounted on a partthat is fixed relatively to the rotation of the platen, a cam that ismounted to turn on the axis of the platen, a finger-piece for movingsaid cam, and a friction-shoe which is forced into contact with an endof the platen when the cam is moved to release the detent.

23. In a type-writing machine, the combination of a platen, aplaten-shaft, a line-spacing ratchet-Wheel, a cooperating detent, asleeve that surrounds the platen-shaft, and which is fixed to theplaten-frame, a frictiondisk that is carried by said sleeve and adaptedto bear against a part that revolves with the platen, and means forapplying pressure to the friction-disk when the detent is moved out ofengagement with the teeth of the ratchet-wheel.

24. In a type-writing machine, the combination of a platen, aplaten-shaft, a line-spacing ratchet-wheel, a cooperating spring-detent,a sleeve that surrounds the platen-shaft and which is fixed to theplaten-frame, afriction-disk that is carried by said sleeve and adaptedto bear against a part that revolves with the platen, and hand-operatedmeans for automatically applying the spring-pressure of the detent tothe friction-disk when the detent is moved against the spring-pressurethereof and out of engagement with the teeth of the ratchet-Wheel.

25. In a type-writing machine, the combination of a platen, aline-spacing ratchetwheel, a cooperating spring-detent therefor, ahand-operated detent-releasing device that turns on the axis of theplaten and moves longitudinally thereof, and means which afford adisengagement of the detent from the ratchet-wheel by turning thereleasing device and which alfords a pressure on the platen bya movementof said releasing device in the direction of the length of the platen.

26. In a type-writingmachine, the combination of a platen, aline-spacing ratchetwheel therefor, a spring-detent for said linespacingratchetwheel, and means for automatically applying the spring-pressureof the detent to a smooth side of the ratchet-wheel when the detent ismoved out of contact with the teeth of the ratchet-wheel.

27. In a type-writing machine, the combination of a platen, aline-spacing ratchetwheel, a springdetent, a friction-disk, and meansfor applying the spring-pressure of the detent to the friction-disk whenthe detent is moved out of contact with the teeth of the ratchet-wheel,to afford fractional line- 'spacing of the platen.

28. In a type-writing machine, the combination of a platen,aplaten-shaft, a linespacing ratchet-wheel therefor, a springdetent thatnormally bears upon the teeth of the ratchet-wheel, a sleeve thatsurrounds the platen-shaft and is secured against rotation with theplaten, afriction-disk that is secured to said sleeve, a plate thatturns on said sleeve, a finger-piece for turning said plate, a cam onthe plate that is adapted to force the detent out of engagement with theteeth of the ratchet-wheel and to apply pressure to the friction-diskand through the disk to the platen, and thereby afiord a fractionallinespacing of the platen.

29. In a type-writing machine, the combination of a platen, aplaten-shaft, a line-spacing ratchet-wheel therefor, a spring-detentthat normally bears upon the teeth of the ratchetwheel, a sleeve thatsurrounds the platen-shaft and is secured against rotation with theplaten, a friction-disk that is secured to said sleeve, a plate thatturns and moves longitudinally on said sleeve,a finger-piece for turningsaid plate, a cam on the plate that is adapted to force the detent outof engagement with the teeth of the ratchet-wheel and to simultaneouslyefiect a longitudinal move ment of the plate on the sleeve to apply thepressure of the spring-detent to the frictiondisk, and through the diskto the platen, and

thereby aftord a fractional line-spacing of the platen. I

30. In a type-writing machine, the combination of a platen, aplaten-shaft arranged to rotate with the platen, a hand-wheel on theplaten-shaft, a line-spacing ratchet-Wheel arranged to rotate with theplaten, a springdetent for the Z'ratchet-wheel, a sleevethat surroundsthe platen-shaft but is fixed with relation to the rotation thereof, africtiondisk secured to said sleeve and adapted to bear on aplaten-head, a plate that is loosely mounted on the sleeve and isadapted to turn and to move longitudinally thereon, a fingerpiececonnected to said plate, and a cam on the plate for moving the detentagainst the tension of its spring to remove the detent from engagementwith the teeth of the ratchet-wheel and to apply pressure of thespring-detent to the friction-disk.

31. In a type-Writing machine, the combination of a platen, aplaten-shaft arranged to rotate with the platen, a hand-Wheel on theplaten-shaft, a line-spacing ratchet-wheel arranged torotate with theplaten, a springdetent for the ratchet-wheel and the pressure of whichis exerted in the direction of the length of the platen, a sleeve thatsurrounds the platen-shaft but is fixed with relation to the rotationthereof, a friction-disk secured to said sleeve'aud' adapted to bear ona platenhead, a plate that is loosely mounted on the sleeve and isadapted to turn and to move longitudinally thereon, a finger-piececonnected to said plate and by which it is moved, a pin on the plate tolimit its turning movement in one direction, and a cam on the plate formoving the detent against the tension of its spring to remove the detentfrom engagement with the teeth of the ratchet-wheel and to afford alongitudinal movement of the plate on the sleeve for applying thepressure of the spring-detent to the friction-disk.

Signed at Springfield, in the county of Hampden and State ofMassachusetts, this 6th day of August, A. D. 1902.

CARL GABRIELSON.

\ -Vitnesses:

J. G. DUNNING, C. S. HAWKINS.

